<div class="example boards">
  <div class="board panel">
    <div class="panel-heading">
      <strong>进行中</strong>
    </div>
    <div class="panel-body board-list">
      <div class="board-item">
        设计界面
      </div>
      <div class="board-item">
        撰写文档
      </div>
      <div class="board-item">
        紧急的任务
      </div>
    </div>
  </div>
  <div class="board panel">
    <div class="panel-heading">
      <strong>已完成</strong>
    </div>
    <div class="panel-body board-list">
      <div class="board-item">
        初步设计
      </div>
      <div class="board-item">
        数据库设计
      </div>
      <div class="board-item">
        需求整理
      </div>
    </div>
  </div>
  <div class="board panel">
    <div class="panel-heading">
      <strong>未完成</strong>
    </div>
    <div class="panel-body board-list">
      <div class="board-item">
        测试
      </div>
      <div class="board-item">
        发布
      </div>
      <div class="board-item">
        庆祝
      </div>
      <div class="disable-drop board-item">
        不可拖拽
      </div>
    </div>
  </div>
</div>
